i have a requirement where the Text value should modify and set the modified value.
The Text Value is file path selected by the user.
txtPath.addModifyListener(new ModifyListener() {
#Override
public void modifyText(ModifyEvent e) {
// TODO Auto-generated method stub
Text text= (Text)e.widget;
File fi= new File(text.getText());
text.setText(fi.getParent().toString());
}
});
Iam getting an error in setting the value.
If user Selected path is "C:\test\folder\sample.xml"
The modify text path should be set with new value as "C:\test\folder"
A modify event is triggered whenever the value changes--meaning for every keypress in the text field, and also by the setText() which you are calling. You probably want to listen for the focus lost event rather than the modify event.
Related
I have a problem with validation on form actually sub-form.
In my website I have some kind of table and "Add row" button (BlockingAjaxSubmitLink).
When I try add let say 2 rows, I get validation error (because row in this table has Required=True parameter) and I can't add another row. I tried use simple AjaxLink but it doesn't have reference to form in onClick method and when I complete some rows and click "Add row" this data get lost.
I want to enable validation only after "save" button click.
Any idea how to deal with this problem?
I do something like you want using an AjaxLink.
My AjaxLink:
private AjaxLink addNewRow = new AjaxLink("addNewRow") {
#Override
public void onClick(AjaxRequestTarget target) {
MyEntityObject newTableRowObject = new MyEntityObject(irrelevantParameter);
entityObjectTableService.createNewRowInDB(newTableRowObject );
target.add(listViewContainer);
}
};
In this code the listViewContainer is a WebMarkupContainer which contains a ListView holding the table rows.
When i click this AjaxLink a new object representing a row in my table is added to the database and then the container containing the ListView is being refreshed refreshing the ListView and the new empty object is being fetched from the DB and shown as a new row in my table at the end.
Depending on your structure maybe you are looking after disabling validation using setDefaultFormProcessing(true); - http://ci.apache.org/projects/wicket/apidocs/6.x/org/apache/wicket/markup/html/form/AbstractSubmitLink.html#setDefaultFormProcessing%28boolean%29
For now I write some kind of hack
First I set
addKnowledgeLink.setDefaultFormProcessing(false);
and next
BlockingAjaxSubmitLink<Object> addKnowledgeLink = new BlockingAjaxSubmitLink<Object>(
"link_knowledge_add") {
#Override
protected void onSubmit(AjaxRequestTarget target, Form<?> form) {
ChangeDataForm.this.process(this);
/* some code */
target.add(form.get(MY_CONTAINER_ID));
}
(...)
and my hack...
//HACK
public void process(IFormSubmitter object){
if (!isEnabledInHierarchy() || !isVisibleInHierarchy())
{
return;
}
// run validation
validate();
/*if (hasError())
{
// mark all children as invalid
markFormComponentsInvalid();
// let subclass handle error
callOnError(object);
}
else
{*/
// mark all children as valid
markFormComponentsValid();
// before updating, call the interception method for clients
beforeUpdateFormComponentModels();
// Update model using form data
updateFormComponentModels();
// validate model objects after input values have been bound
onValidateModelObjects();
if (hasError())
{
callOnError(object);
return;
}
// Form has no error
delegateSubmit(object);
//}
}
and I ovveride one method
#Override
protected void onError(){
super.onError();
this.updateFormComponentModels();
}
I know it is ugly solution but I couldn't figure out anything better..
And I couldn't shutdown feedback messages
I'm using UploadItem, RadioGroupItem and some other widgets. RadioButton is having onChangeHandler which will decide what all other components need to be displayed. I've uploaded some file using UploadItem. Then I changed the radio button selection. On changing the radio button, required widgets are getting displayed properly but whatever file I'd selected using UploadItem is going away. Fresh UploadItem widget is getting displayed. In other words page is getting refreshed.
My requirement is whenever I change radio button option, required widget should displayed along with that whatever file I had selected using UploadItem should remain same.
My Code is something like this:
UploadItem upload = new UploadItem();
RadioGroupItem radioGroup = new RadioGroupItem();
HashMap map = new HashMap();
map.put("option1","option1");
map.put("option2","option2");
radioGroup.setValueMap(map);
TextItem textbox = new TextItem();
radioGroup.addChangeHandler(new ChangeHandler(){
public void onChanged(ChangedEvent event) {
String radioValue =((String)event.getValue());
if(radioValue.equalsIgnoreCase("option2")){
textbox.show();
}else{
textbox.hide();
}
}
});
Add all created widgets to DynamicForm object using dynamicForm.setFields(all created widgets)
Changing the radio button should hide and show the textBox. But while doing that page is getting refreshed and whatever file we had selected using UploadItem is lost.
As per the documentation for hide() and show() of FormItem class, invocation of any of these methods, will cause the DynamicForm to be redrawn.
So it may cause the problem you're getting.
To overcome this issue, I would suggest you to put UploadItem in a separate DynamicForm.
fire an event on radio Selection change as
radioButton.addListener(Events.Change, new Listener<BaseEvent>() {
#Override
public void handleEvent(BaseEvent be) {
if(radioButton.getValue()){
//fire an event here for ur widget
}
}
});
I started using the CellTable widget. I need an editable text cell so I tried TextInputCell but to my dismay, I can't find the "value change handler".
How can I get notified when the cell content changes?
You don't need change handlers for cells. You set a FieldUpdater on your column. It has update() method which fires when value of a cell in this column changes. For example:
myEditableColumn.setFieldUpdater(new FieldUpdater<T, String>() {
#Override
public void update(int index, T object, String value) {
// do something when value changes
}
});
I'm having a problem using a GWT listbox. I have a case where the user selects a value from a listBox, but it can become invalidated if they change data in a related field. To validate the listBox, the user has to either select a new value, or confirm their old selection by selecting the same value again. I can't figure out how to determine if they have selected the same value so that I can restyle the listBox to look validated.
The valueChanged handler only detects if a new value is selected. The clickHandler and focusHandler fire too often because they fire when the user isn't selecting a value. Any ideas?
You can improve the clickHandler with something like this :
ignoreClick = true;
lastSelection = -1 ;
....
listBox.addClickHandler(new ClickHandler() {
#Override
public void onClick(ClickEvent event) {
if (!ignoreClick) {
lastSelection = listBox.getSelectedIndex();
}
ignoreClick = !ignoreClick;
}
});
I tried it and the event was only fired if you selected an item. But you should rethink your user interface , like said above.
I am using the following constructor to create a checkboxcell in an editable data grid.
CheckboxCell(false, true)
When I use this and click at any place in the row, selection change event does not fire and I am using single selection model .
When I use,
CheckboxCell();
Selection change event fires on the row but,
1) We have click twice to check or uncheck the cell.
2) if we check or uncheck in the checkboxcell, the value will reverted as soon as I click anywhere.
I am trying to figure out the solution, but not successful yet. Any help would be appreciated.
Am using GWT 2.4.0
The problem is because of selection if possible do not use selection model. and add field updater for the column of check box. I have used this:
Column< GridReportFields, Boolean > cb = new Column< GridReportFields, Boolean >(new CheckboxCell() ) {
#Override
public Boolean getValue(GridReportFields object) {
// TODO Auto-generated method stub
return object.getCheckb();
}
};
cb.setFieldUpdater(new FieldUpdater<GridReportFields, Boolean>() {
#Override
public void update(int index, GridReportFields object, Boolean value) {
// TODO Auto-generated method stub
object.setCheckb(value);
dataGrid.redraw();
}
});
here gridReport Field is my model class. and setCheckb is is setter for the boolean variable that holds the value of checkbox.